A7Sii IBIS Manual focal length Setting in Crop Mode?

[Markus Chow]

I can't seem to find the answer anywhere about this use case. 

I am using a 18-35mm Sigma F1.8 apsc lens adapted to Commlite smart adapter with my a7sii.

1. When I am shooting in APSC (Crop) mode, is the camera smart enough to read the Sigma focal length distance from smart adapter to determine suitable image stabilization settings?

2. If i have to use manual focal distance settings (In CROP MODE), do I just select 18-35mm? or do I need to put in the apsc focal length equivalent 27-51mm? 

3. I am unsure if I am using a FF lens at 135mm with manual IS focal length set at 135mm, if I go into crop mode do I need to adjust the focal length to 202.5mm? 

I suck at math and hopefully camera is smart enough to do it for me lol!

Thanks for your insight and help!

Mark

 

[Nikkor]

2&3 The focal length does not change.

[Geoff CB]

What Nikkor said, it's still the same focal length, the sensor would not need to move any more that it already does.

[Markus Chow]

22 hours ago, Nikkor said:

2&3 The focal length does not change.

 

21 hours ago, Geoff CB said:

What Nikkor said, it's still the same focal length, the sensor would not need to move any more that it already does.

Thanks all for the confirmation!